Hi, i readed it, and am glad that you liked the game, after reading your suggerence i understaned it as a "stamina bar" right?
When its full, you can perform some heavy attacks as you say, after thinked it in a really short time, is not really a bad idea, instead, is a really great one!
Or even perform some time of glory kills when is really full the bar, will take some time to make it, but at this progress i think is not gonna take me a lot. But first, am gonna finish all the game, and then work on it, and this can extend the variety of Gameplay and make it very fun.
Oh Also, i saw the "Super Star Game" HOLY HECK, HOW I NEVER I HEARED ABOUT IT, IS SO GOD DAMN COOL.
Thanks for the feedback and the suggestions! helped me really much!